Gold “Mining” Termites Found, May Lead Humans to Riches

National Geographic ^ | December 12, 2012 | Christine Dell'Amore

[nickcarraway]

Insects stockpile precious metal while gathering nest material, study says.

Want to know if you're literally sitting on a gold mine? Get some termites, a new study suggests.

New experiments in West Australia reveal that termites "mine" and stockpile the precious metal while they're collecting subterranean material for their nests.

For the study, entomologist Aaron Stewart, with Australia's Commonwealth Scientific and Industrial Research Organisation, and colleagues took samples from several termite nests and compared the nest material to nearby soil samples from varying depths.

By using a mass spectrometer—an instrument that measures molecules' chemical makeup—they discovered that the termite nests were richer in gold than termite nests farther away from the metal, Stewart said in an email. (Also see "Battling Termites? Just Add Sugar.")

"That social insect colonies can selectively accumulate metals from their environment has been known for some time," Robert Matthews, a professor emeritus of entomology at the University of Georgia, noted by email.

"Some have even suggested that ant and termite nests could be analyzed productively when searching for potential mining sites for precious metals" such as gold, he said.

Those are Stewart's thoughts exactly. Gold deposits are usually hidden a few meters below the surface, making them tough for people to locate. But insects could essentially act as indicators of this buried treasure, said Stewart, whose study appeared recently in the journal Geochemistry: Exploration, Environment, Analysis.

"Drilling is expensive. If termites can help narrow down the area that needs to be drilled, then exploration companies could save a lot of money."

Termites Worth Their Waste in Gold?

In a related study published in 2011 in PLoS ONE, Stewart and his colleagues set out to find if termites, like many animals, accumulated metals within their bodies—potentially another way to pinpoint valuable mineral deposits.

Just as mammals accumulate calcium to maintain bones, some insects stockpile zinc and magnesium to harden their exoskeleton, particularly their jaws. Metals such as zinc act to reinforce those body parts.

But insects are also really good at excreting metals they do not need or that are toxic to them, Stewart noted. For example, insects shed metal either during molting or as tiny stones, much like kidney stones in humans. (Also see "Rock-Eating Bacteria 'Mine' Valuable Metals.")

When Stewart started to investigate insect excretory systems, he made a "fascinating" discovery that certain organs in the termite's excretory system contain varying amounts of metals-hinting at unknown processes going on inside the termite. That's important, he said, because it means that termite waste is a "driving force" for how metals get redistributed in an ecosystem.

[nickcarraway]

[null and void]

Is that Invader Zn?

[American in Israel]

Interesting theory. I noticed as a young man prospecting that there was a certain species of Ant in the Sierras that tended to have nests in gold deposits. I and my friends naturally started calling them “Gold Ants”. They looked like a standard Red Ant, but had a black body with a red section in the middle.

Always wondered at that coincidence. This is as close as I could find.

[mikrofon]

I want my own Horta...

[muawiyah]

For a few thousand years after an event that spreads gold flour (microscopic gold particles) over an area, that gold is ON the surface. There's evidence that ancient Egyptians mined gold flour, and also that North American Indians did so ~ and probably for the same reason ~ a belief that it was the Sungod's sunlight.

There's no particular way of mining this stuff ~ it's very diffuse and consolidating it takes considerable time. Ancient Indian mounds in the midwest could be the clue to how they did it ~ for sure they are located in concentrations of the gold effluvia ejected when the hypothetical comet strike hit a residual ice sheet in Canada 12000 years ago.

A very simple gold concentration device would be the common D-handled shovel. Build a circular trench. Everyday bring a shovel full of surface dirt to the circle and toss it in the middle. Over time rainfall should worry any gold flour out of that shovelful of dirt.

This could go on for hundreds of years but think of the pocket change!

It might have been rather obvious that termites collected gold over in Egypt and up the Nile. There the termites build large mound nests. Set fire to one and sift the ashes.

In North America it would be less obvious unless you dug into a major termite nest in the ground and found a peculiar but comforting glint ~ so, just find termites and start piling up dirt. I suspect they toss the effluvia containing gold over the top.

[green pastures]

Just remember to go easy on the mind melds...

My preference would be for a replicator, a holodeck and a tribble. Wait, scratch the last one— they’re way too much trouble.

LL&P

[S.O.S121.500]

Functionally its easier to train pack or trade rats to take care of collections.

[SunkenCiv]

Thanks nickcarraway.

...termite waste is a "driving force" for how metals get redistributed in an ecosystem.